Producing　goods　and　services　all　needs　water　consumption.　The　water　used　in　the　process　of　an　agricultural　or　industrial　product　is　called　the　“Virtual　Water”　contained　in　this　product.　Through　international　trade,　water-scarce　countries　and　regions　could　purchase　water-intensive　products-especially　foods,　from　water-rich　countries　to　balance　their　water　deficits　and　achieve　water　safety.　China　is　one　of　the　13　most　water-deficit　countries　whose　water　safety　have　been　severely　challenged.　This　paper　generalized　the　recent　global　research　development　and　made　a　brief　introduction　about　the　methods　calculating　virtual　water　content　in　specific　products.　As　a　case　study,　we　qualified　China’s　annual　virtual　water　flows　from　year　2000　to　2002　with　trade　in　crops,　and　ended　with　some　policy　advice　for　application　and　practice　of　virtual　water　strategy.　©　2006　Taylor　and　Francis　Group,　LLC.